Water in Dune

[sous-tension]

Well, I recently had to write an essay on this book and chose to write
about the significance of water on Arrakis.
After searching for hours, I was still left with one question:

How many times is the word "water" used in that book?

If I could have included that in my essay, I am almost sure that I
would have been able to make a better grade.

Can anyone answer that question for me??

Thanks.